LogFunc.h

00001 /**
00002  * ACKme WiConnect Host Library is licensed under the BSD licence: 
00003  * 
00004  * Copyright (c)2014 ACKme Networks.
00005  * All rights reserved. 
00006  * 
00007  * Redistribution and use in source and binary forms, with or without modification, 
00008  * are permitted provided that the following conditions are met: 
00009  * 
00010  * 1. Redistributions of source code must retain the above copyright notice, 
00011  * this list of conditions and the following disclaimer. 
00012  * 2. Redistributions in binary form must reproduce the above copyright notice, 
00013  * this list of conditions and the following disclaimer in the documentation 
00014  * and/or other materials provided with the distribution. 
00015  * 3. The name of the author may not be used to endorse or promote products 
00016  * derived from this software without specific prior written permission. 
00017  * 
00018  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS AND ANY EXPRESS OR IMPLIED 
00019  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00020  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
00021  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00022  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
00023  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
00026  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
00027  * OF SUCH DAMAGE.
00028  */
00029 #pragma once
00030 
00031 #include "api/WiconnectTypes.h"
00032 #include "FunctionPointer.h"
00033 
00034 namespace wiconnect
00035 {
00036 
00037 typedef int (*_LogFunc)(const char *str);
00038 
00039 
00040 /**
00041  * @ingroup api_core_types
00042  *
00043  * @brief Logging callback function.
00044  */
00045 class LogFunc : public FunctionPointer
00046 {
00047 public:
00048     /*************************************************************************************************/
00049     LogFunc(_LogFunc func = 0)
00050     {
00051         _function = (void*)func;
00052         _membercaller = NULL;
00053         _object = NULL;
00054     }
00055 
00056     /*************************************************************************************************/
00057     template<typename T>
00058     LogFunc(T *object, WiconnectResult (T::*member)(const char *str))
00059     {
00060         _object = static_cast<void*>(object);
00061         memcpy(_member, (char*)&member, sizeof(member));
00062         _membercaller = (void*)&LogFunc::membercaller<T>;
00063         _function = 0;
00064     }
00065 
00066     /*************************************************************************************************/
00067     int call(const char *str)
00068     {
00069         if (_function)
00070         {
00071             return ((_LogFunc)_function)(str);
00072         }
00073         else if (_object)
00074         {
00075             typedef int (*membercallerFunc)(void*, char*, const char *str);
00076             return ((membercallerFunc)_membercaller)(_object, _member, str);
00077         }
00078         else
00079         {
00080             return -1;
00081         }
00082     }
00083 
00084 private:
00085 
00086     /*************************************************************************************************/
00087     template<typename T>
00088     static int membercaller(void *object, char *member, const char *str)
00089     {
00090         T* o = static_cast<T*>(object);
00091         int (T::*m)(const char *str);
00092         memcpy((char*)&m, member, sizeof(m));
00093         return (o->*m)(str);
00094     }
00095 };
00096 
00097 
00098 
00099 
00100 }